Anybody here knows how to get wireless setup so it keeps working after a reboot? I want to move the miners to the shed soon, where I don't have UTP cables. I have connected an antenna and the signal strength seems to be good but still it does not like it when I remove the network cable.

It is still connected to the router through the wifi (the router sees it and figures it's alive), but it does not accept pings. As soon as I connect a network cable, even if not configured on the other end (like an unconnected switch) it starts working. The fix for this is to disable the wired network (WAN), which works until you reboot (then it's re-enabled).

Another issue it has is that dnsmasq does not work over wireless, the only way to get DNS to work is to add an entry to /etc/resolv.conf, which is again lost after a reboot.